What's Wrong with this code? I just can't tell 😑.

Question

#include <stdio.h>
#include <stdlib.h>

int main();
{ char c;
int i;
float f;
double d;

char = ' a';
int = 1;
float = 19.0;
double = 2000.0009;

printf("c%\n", c);
printf("%d\n", i);
printf("%f\n", f);
printf("%f\n", d);
return (0);
}

Answer 1

Values are equal to variables not data types

c = 'a';
i = 1;
f = 19.0;
d = 2000.0009;

printf("%c\n", c);

Answer 2

and
printf("%lf\n",d);

Answer 3

1. Semicolon after main function.
2. char = 'a' int = 1 float = 12.0 double = 2000.0009
Data types can not hold values.